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Practical hints
What to do if …
Left display Right display Possible cause/consequence Possible solution
F
Key Detected
In Vehicle
A SmartKey with KEYLESS-GO* left
in the vehicle was recognized while
locking the vehicle from the out-
side.
̈ Take the SmartKey with KEYLESS-GO* out of
the vehicle.
.
3rd Brake Lamp
The high mounted brake lamp is
malfunctioning. This message will
only appear if a critical number of
LEDs have stopped working.
̈ Contact an authorized Mercedes-Benz Center
as soon as possible.
AUTO Light
Inoperative
The light sensor is malfunctioning.
The headlamps switch on automati-
cally.
̈ Contact an authorized Mercedes-Benz Center
as soon as possible.
To switch off the headlamps (U.S. vehicles only):
̈ In the control system, set lamp operation to
manual mode (
୴ page 163).
̈ Switch on headlamps using the exterior lamp
switch (
୴ page 131).
Brake Lamp
Left
Auxiliary Bulb On
The left brake lamp is malfunction-
ing. An auxiliary bulb has been
brought into use.
̈ Contact an authorized Mercedes-Benz Center
as soon as possible.
Brake Lamp
Right
Auxiliary Bulb On
The right brake lamp is malfunction-
ing. An auxiliary bulb has been
brought into use.
̈ Contact an authorized Mercedes-Benz Center
as soon as possible.